An electronic monitoring system is attachable to the wheel-end of a wheeled vehicle. The system monitors sensor readings and may analyze the readings to diagnose conditions related to vehicle components, including tires, axles, bearings or components of the monitoring system. The system may analyze readings to predict, or prognosticate, conditions related to vehicle components or to components of the monitoring system.

A valve assembly for a tire pressure management system includes a housing. A first chamber (32) is provided in the housing. A second chamber (38) is provided in the housing. The second chamber is selectively in fluid communication with the first chamber. A third chamber (44) is provided in the housing. The third chamber is selectively in fluid communication with the second chamber. A deflate piston (120) is at least partially provided in the third chamber and the second chamber. The deflate piston (120) selectively permits or prevents fluid communication between the second chamber and the third chamber. An inflate piston (72) is attached to the deflate piston (120). The inflate piston (72) is at least partially provided in the second chamber and the first chamber. The inflate piston (72) selectively permits or prevents fluid communication between the first chamber and the second chamber. At a first pressure, the second chamber is in direct fluid communication with the first chamber and, at a second pressure, the second chamber is in direct fluid communication with the third chamber. The second pressure is greater than the first pressure and the first pressure is greater than an initial pressure.

An axle assembly includes a first axle shaft. The first axle shaft includes a first conduit. A second axle shaft includes a second conduit. The first conduit and the second conduit are in fluid communication through a chamber. A differential is operatively connected to the first axle shaft and the second axle shaft. The chamber is at least partially disposed within the differential.

A tire pressure management system includes at least an axle, a hubcap supported by the axle and having an interior and an exterior, and a rotary union mounted to the hubcap. The rotary union includes at least rotary union housing providing a central bore, a fluid conduit having upstream and downstream ends, and a bearing in contact engagement with the fluid conduit via an inner race of the bearing, and in sliding engagement with a bearing sleeve via an outer race of the bearing. The bearing sleeve in pressing contact with the central bore; and a seal, is disposed between the bearing and the downstream end of the fluid conduit.

A tire inflation system safety valve includes at least an air line disposed between a rotary union and a tire communicating with an axle supporting a hubcap, the rotary union axially aligned with the axle and mounted to the hubcap. The air line facilitating pressurized air transferred between the rotary union and the tire. The tire inflation system safety valve including at least a valve housing providing a valve activation chamber, a fluid conduit, supported by the valve housing, having a downstream end and an upstream end and in fluid communication with the valve activation chamber, and a diaphragm disposed within the valve activation chamber and communicating with the fluid conduit. The diaphragm, in response to the pressurized air of a predetermined pressure, automatically precludes air transfer between the upstream end of the fluid conduit and the downstream end of the fluid conduit.

A tire pressure management system includes at least an axle, which houses pressurized fluid, and is supported by a tire. A vehicle frame supported by the axle, by way of a suspension is disposed between frame and the axle. Also included is a pressure management controller (PMC) supported by the frame, which communicates with the tire. A load detection device (LDD) interacting with the suspension determines a value for a load supported by the suspension. The PMC provides at least a central processing unit (CPU) programmed with a lookup table that associates the value determined by the LDD with a predetermined pressure for the tire. The CPU directs an inflation, else a deflation of of the tire based on the determined value.

A rotary union having a housing, a shaft rotatably disposed within the housing, and a tube having a first end sealingly disposed within the shaft and a second end sealingly coupled to the housing. A tire inflation system may comprise a rotary union externally mounted to a vehicle wheel end or mounted to a vehicle fairing.

A motor vehicle with a compressor assembly for the supply of a pressure medium to a tire cavity of a tire of a motor vehicle. The compressor assembly has a compression chamber which is rotationally fixed in relation to the motor vehicle wheel, and the compression chamber and the tire cavity are connected via a fluidic connection for the conveying of a pressure medium from the compression chamber into the tire cavity. A tire sealing device has a sealant reservoir with a first connection fluidically connected to a tire cavity of a tire of the motor vehicle to be repaired, and a second connection fluidically connected to a pressure medium source secured to the motor vehicle. The sealant is conveyed out of the pressure medium source into the tire cavity of the tire to be repaired by means of the pressure medium.

A control system for a motor vehicle includes a central tire inflation system (CTIS) electronic controller, the CTIS controller being configured to control the CTIS to cause inflation and deflation of one or more tires, the CTIS controller being configured to cause the CTIS to operate in a selected one of a plurality of operating modes in each of which the system is configured to set a pressure of one or more tires of the vehicle to a predetermined tire pressure value, the CTIS controller being configured to receive data indicative of a type of tire fitted to the vehicle, the controller being configured to prevent operation in a predetermined at least one of the plurality of operating modes in dependence on the data indicative of tire type.

A tire inflation system wheel valve assembly is provided. The wheel valve assembly may include a body portion coupled with a cover portion. A diaphragm may be disposed between the body portion and the cover portion. The diaphragm and the body portion define a control cavity; and the diaphragm and the cover portion define a cover cavity. At least one control port is in fluid communication with the control cavity. In addition, a tire port is in selective fluid communication with the control cavity. Further, the cover portion defines an aperture in fluid communication with the atmosphere and the cover cavity.